About the Average Calculator
What is the Average Calculator?
The average, or arithmetic mean, is the sum of a set of values divided by how many values there are. It gives a single “typical” number that summarises a list — average marks, average monthly spending, average daily steps or average sales per day.
Type or paste your numbers separated by commas, spaces or new lines. The calculator returns the mean together with the total, the number of values, the minimum and maximum, and the range (maximum − minimum), which shows how spread out the data is.
How to use the Average Calculator
- Numbers (separated by commas or spaces) — separate numbers with commas, spaces, semicolons or line breaks; negatives and decimals are allowed. (sample: 12, 18, 25, 30, 15)
- Press Calculate Average (results also refresh as you type). The result card shows the Average (Mean), along with Sum, Count, Smallest and Largest.
Formula used
Mean = (x₁ + x₂ + … + xₙ) ÷ n
- xᵢ = each value in the list
- n = the number of values
The mean uses every value, so a single very large or very small number (an outlier) can pull it a long way. For skewed data such as salaries or house prices, also look at the median.
Worked example
These are the sample values already filled in the calculator above, and the result it returns for them:
| Input | Sample value |
|---|---|
| Numbers (separated by commas or spaces) | 12, 18, 25, 30, 15 |
| Result | Value |
|---|---|
| Average (Mean) | 20 |
| Sum | 100 |
| Count | 5 |
| Smallest | 12 |
| Largest | 30 |
| Range | 18 |
Tips for using the Average Calculator
- You can paste a column straight from Excel or Google Sheets — line breaks work as separators.
- If some values should count more than others (credits, quantities, weightage), use the Weighted Average Calculator instead.
- Compare the mean with the median: if they differ a lot, the data is skewed by outliers.